1, marterial: aluminium 2, 4*3 steps 3, certificate of EN131 is available itemYND-L603Dmaterialaluminium alloy 6063,PVC, steelthickness of aluminium (mm)1.35max load (kg)150packingPE bag Net Weight (kg)11.5Gross Weight (kg)11.8space between two steps (mm)290total length (mm)3700closed measure (mm)1010×380×28020GP/40GP/40HQ (pcs)304/539/632certificateEN131 multi-purpose aluminium ladder with EN131 ...